Ranging method and system, especially for radar si

专利名称：Ranging method and system, especially for

radar signal processing for ambiguous rangeradars

发明人：Frank F. Kretschmer, Jr.,Karl R. Gerlach申请号：US07/372962申请日：19890629公开号：USH0000767H1公开日：19900403

摘要：A method and apparatus exploiting the discovery that the cross- correlation ofrows of Frank or P4 matrices of a given spacing sum to zero. In a ranging system, such asa radar, pulses are coded according to the rows of a Frank or P4 matrix, transmittedsequentially and each return processed sequentially through a filter matched to one ofthe coded pulses. (A different preselected filter is used for each return.) The sequence offilters is chosen so that for returns for a given range interval, each filter is matched to thereturning pulse, resulting in outputs from the filters representing auto-correlations ofthe returned pulses. These outputs are time delayed added coherently to form thecompressed pulse, and annunciated as a target hit. Should the filters and returns bemismatched, as with ambiguous stationary clutter returns, the outputs of the filters arecross-correlations which, according to said discovery, sum to zero. Thus the inventionoperates to remove ambiguous range clutter from returns in such a ranging system.

代理人：Thomas E. McDonnell,Edward F. Miles

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